Charles W. Flanagan High School opened its doors in 1996 as the first public high school in Pembroke Pines, Florida. Flanagan High School is located near Broward County's C.B. Smith Park and the Walter C. Young Middle School and Resource Center.

Flanagan’s enrollment is now just over 3000. The school used to operate on a block schedule with four periods in a day, each period being about 90 minutes long. As of the 2016-2017 school year, Flanagan High School dropped this schedule and picked up a more cost-effective schedule provided by the Broward County School Board. Flanagan High School was featured as a "Top 1000 high schools in the nation" by Newsweek based on statistics such as Advanced Placement enrollment.

Flanagan has a Florida Comprehensive Assessment Test (FSA) school grade of "A" for the 2016-2017 academic year.^[4]

It was named after a mayor of Pembroke Pines, Charles W. Flanagan.

Flanagan High School’s World Guard was named the 2008 and 2012 WGI Scholastic World Champions after competing at the WGI World Championships in Dayton, Ohio and beating all other competitors in their division. In 2008 they performed their show "Post Secret" based on the community mail art project, PostSecret, earning a score of 96.9. They became the first color guard in Florida to be crowned champions in the Scholastic World Class. In 2012, they again earned the Scholastic World Championship title with their show "Project Innocence", derived from the Innocence Project, earning a 95.5. That year they also became the first ever Scholastic World Guard to take home the Fans’ Favorite Award in Dayton, Ohio at the 2012 WGI World Championships. ^[5]

In 2009 and 2011 the Flanagan World Guard received the Bronze Medal at World Championships. Most recently, the Flanagan World Guard earned the Silver Medal in 2013.

The Flanagan World Guard has also won the South Florida Winter Guard Association World Class Championship every year since their promotion to World Class in 2003

The Flanagan High School Wind Orchestra competed at the Grand National Adjudicators Invitational, in Chattanooga, Tennessee. The Flanagan Wind Orchestra was awarded the highest honor of Grand Champion, and was recognized with the “Honor Award” for exceptional achievement as a superior performance group. Flanagan also received the “Judge’s Award” in recognition of Outstanding Woodwinds and Percussion in Concert Performance. This was the ensemble's first year attending the Grand NAI. The Flanagan Wind Orchestra had previously won the 2009 National Adjudicator's Invitational in Washington, DC.

Flanagan High School is the 2007 national champion of the NJROTC National Academic, Athletic and Drill Championships.^[6] The Flanagan NJROTC Competition Team defeated the 10-time national champion Flour Bluff High School from Corpus Christi, Texas.^[7] In 2012, The Flanagan High School NJROTC Competition Team won the NJROTC National Championship (led by C/Cmdr Carlos Mongui) ^[8][9],^[10] then in 2013 achieved a back to back championship by winning the U.S. Navy's first ever virtual national championship competition.^[11]

State Champions: (2005, 2006, 2010)^[12]

At the start of the 2011-2012 school year, the total student enrollment was 3,164. The ethnic makeup of the school was 19.8% White, 26.3% Black, 45.7% Hispanic, 4.92% Asian or Pacific Islander, 0.41% Native American, and 2.68% Multiracial.^[13]